He observed his hostess attentively from under his shaggy brows, and noticed a subtle change what had transformed her from the listless woman he had known into a being who, for the moment, seemed palpitant with the forces of life. Her speech was warm and energetic. There was no repression in her glance or gesture. She reminded him of some beautiful, sleek animal waking up in the sun. (Chopin, Chpt. 23)
When Dr. Mandelet dines with the Pontelliers he notices a change in Edna. Given the passage above, what word indicates Edna has changed?